Monkey-wrench



(No Model.) u

s H. HBGINBOTTOM au R. c. & W. H. HAYTON MONKEY WRENCH.

NQ. 302,842. Patented Ju1y,29,.1884.,

Attorney PATENT Orrrcn.

SAMUEL I-I. HEGIN BOTTOM, ROBERT C. HAYTON, AND WILLIAM H. HAYTON, OFEAST SAGINAV, MICHIGAN.

MONKEY-WRENCH.

SPECIFICATION forming part of Letters Patent No. 302,842, dated July 29,1884.

Application tiled May 5, 1884. (No model.) A

To @ZZ whom it may concern:

Be it known that we, S. H. Hneinnor'roiu, R. C. HAYfroN, and W. H.HAYTON, of East Saginaw, in the county of Saginaw and State of Michigan,have invented certain new and useful Improvements in Monkey-Wrenches;and we do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form part of thisspecication, in which- Figure l is a side view ot' a monkey-wrenchadapted for nuts. Fig. 2 is a similar view having our improved serratedpipe-gripping jaw applied to the iixed jaw of the wrench. Fig. 3 is asectional view of the iixed jaw with our detachable jaw applied to it.Fig. 4. is a perspective view ofthe gripping-jaw detached from thewrench and inverted.

Thisliuvention has for its object the application to the iixed jaw of amonkey-wrench ofa detachable jaw of peculiar construction, whereby theinstrument can be readily converted from a nut-wrench to a pipe-wrench,and vice versa, as will be fully understood from the followingdescription when taken in connection with the annexed drawings.

Before describing our improvements we desire to state that serrateddetachable jawfaces have been applied to the fixed jaws of wellknownmonkey-wrenches, and therefore we do not broadly claim a pipe-jaw orjawi'ace which can be applied to or detached from the iixed jaw of awrench at pleasure.

A designates the jaw of a monkey-wrench, (or nut-wrench) which jaw ispermanently iixed on a toothed shank, B, having a handle, C, secured toit.

D designates the movable jaw of the wrench, which is looped on the shankB, and adjustable by means of a milled nut, E, in the wellknown manner.The jaws A and D have plain faces adapted for clamping square orpolygonal nuts of various sizes. The fixed Vjaw A is constructed with abutt, the face a `of which is the arc of a circle, and transversely inthis face we make a groove, b. (Clearly shown in Fig. 3 of thedrawings.)

G designates our improved detachable jaw, which is constructed withserrations c on its f grippingface, and also with a loop or frame,

d, adapted to embrace the sides and butt of the xed jaw. The tranverseconnecting-bar of the loop or frame d is constructed with a roundedinternal edge, d, adapted to enter the groove b in the butt of saidiixed jaw when the grippingjaw is'adjusted in its place, as shown inFigs. 2 and 3. At the back of the upturned serrated portion of the jawor jaw- 6o the serrated portion will lie liatly against the face of jawA, and that the rear looped portion, d, of jaw G assumes an obtuse anglewith respect to said face of jaw A. It will also be seen that the planeof the serrated side of the jaw G is at such an angle with respect tothe shank B that most of the strain in turning the pipe or rod grippedbetween jaws A D will be thrown against the said shank, rather thanagainst-the jaw A. The spring s acts to forcibly draw the edge d/ of theconnecting-bar of frame d into the notch or groove b in the butt of thefixed jaw, and to prevent casual detachment of the serrated jaw.

Having described our invention, weclaiml. A serrated grippingjawconstructed of angular form and having a serrated face, aloop-extension, a cross-bar fastening, and a spring, all combined andadapted for use on the fixed `jaw of a nut or monkey wrenchsubstantially as and for the purposes described.

2. The fixed jaw of a monkey-wrench, hav ing a beveled andtransversely-grooved butt, in combination with a detachable serrated jaw provided with a rear cross-bar, and springfastening, all constructedand adapted to opcrate substantially in the manner and for the purposesdescribed.

In testimony that we claim the foregoing as our own we affix oursignatures in the presence of two witnesses.

SAMUEL H. HEGINBOTTOM. ROBERT C. HAYTON. WILLIAM H. HAYTON.

Witnesses:

JAY W. SUTTON, GEO. W. Wnonocx.

